Chelsea are actively exploring the prospect of re-signing Thorgan Hazard from Borussia Monchengladbach.
Brother of Blues winger Eden, the Belgian was a Stamford Bridge player from 2012 until 2015.
BILD says Chelsea boss Antonio Conte is eyeing a summer move for Hazard.
However, Gladbach are likely to be reluctant to sell.
But the draw of returning to Chelsea to play alongside his older brother may make the 24-year-old's decision an easy one.
The youngest of the Hazard family, Kylian, is also at Chelsea.